Could you identify which cookstove(s) was / were being used? This may be significant in that not all ‘improved’ cookstoves have shown demonstrated reductions in PM2.5 under lap conditions, but there is some evidence that the chitetetzo mbaula does reduce HAP and this is the most commonly available ‘improved’ stove in Malawi. e.g.
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Personal exposures to fine particulate matter and carbon monoxide in relation to cooking activities in rural Malawi.
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